What is periodisation?

Periodisation — periodization, in American spelling — is the arrangement of training into blocks with different jobs, in an order that lets each block build on the one before it. The classic sequence is a base block that builds work capacity with moderate loads and more volume; a build block that raises intensity; a peak that sharpens strength on a date; and a deload to clear the fatigue before the next cycle. The idea goes back to Soviet sports science in the 1960s and has survived because it works for the same reason progressive overload does: the body adapts to a changing demand, and a block is a demand with a shape. A block is typically three to six weeks; a deload is one; a whole cycle fits inside a season, and a training year is three or four of them laid end to end.

What are the training blocks, and how long is each?

Liftor writes a year in blocks of its own naming, each a few weeks long: foundation, the base; ramp, where load climbs; push, the hardest sustained work; deload; maintenance, for the stretches when life has other plans; and two kinds of dated block, an event peak with its taper for a race or a meet, and a birthday block, because the app treats a birthday as a date worth peaking for. Each block carries five knobs — intensity, diet strictness, recovery emphasis and two more — which every daily plan reads, so a session written in a push week and one written in a deload week come from the same coach with different instructions.

What happens to the plan when a week goes wrong?

The blocks move; the date does not. A dated peak is pinned to its day and the blocks between now and then are elastic, so a missed week compresses what remains rather than pushing the event off the calendar. When there is not enough runway left to peak properly the app says so plainly, which is the more useful answer. The year is drawn on one screen in the app, with the block you are in and the date everything points at, and it redraws when the facts change.

Does periodized training work better than just training hard?

Yes, by a moderate and well-measured margin. Williams and colleagues pooled eighty-one effects from eighteen studies published between 1988 and 2015 in a 2017 meta-analysis and found that one-rep max strength improved more with periodized training than without it, an effect size of 0.43. Three things sharpened the effect: undulating designs — varying the load and reps across the week — beat linear ones; longer studies and higher training frequencies produced larger gains; and untrained lifters gained the most, though the effect held in trained ones.

The mechanism the authors name is variation. A body given the same demand every week adapts to it and stops; a body given demands that change shape keeps answering. Liftor’s blocks provide the variation on the scale of weeks, and the daily rewrite provides it on the scale of mornings — a push week that reads a poor night still writes a lighter day inside it.

Linear, undulating or block: which kind of periodization?

They answer different questions, and a good plan uses two of them at once. Linear periodization raises the load and lowers the reps steadily over a cycle — 12s become 10s become 8s become 5s — and is the simplest to run and the easiest to outgrow. Undulating periodization varies the load and reps day to day or week to week, so Monday is heavy fives and Thursday is lighter tens, which is the design the meta-analysis above favoured. Block periodization gives each stretch of weeks one job — capacity, then strength, then a peak — and is how the training year is organised in every sport that has a season.

Liftor draws blocks for the year and undulates inside them. The block sets the job and the knobs — intensity, volume, recovery emphasis, diet strictness — and the morning check-in sets the day, so the weekly shape is planned and the daily load is earned. A lifter who only ever ran a linear cycle will find the sessions less predictable and the plateaus shorter.

What does each of Liftor’s blocks do?

Block	Its job	What changes
Foundation	Work capacity; the base	Moderate loads, more sets, the movements rehearsed
Ramp	Load climbs	Intensity up week on week, volume steady
Push	The hardest sustained work	Heaviest loads, tightest diet, the deload signals watched closely
Deload	Clear the fatigue	About 40% fewer sets, same lifts, rest timer 15 s shorter
Maintenance	Hold what you have	Fewer sessions, moderate everything, for when life has other plans
Event peak and taper	Arrive sharp on a date	Load high then falling, volume falling, the date pinned
Birthday	A date worth peaking for	Treated as an event, with its own small taper

Every block carries the same five knobs and every daily plan reads them, so a session in a push week and a session in maintenance come from the same coach with different instructions. The dated blocks are pinned; the others stretch and compress around them when a week goes wrong.

Sources

Williams TD, Tolusso DV, Fedewa MV, Esco MR. Comparison of periodized and non-periodized resistance training on maximal strength: a meta-analysis. Sports Medicine, 2017; 47(10): 2083–2100
Liftor’s phase model: the eight block types and the five knobs each carries (types/phasing.ts and the phase engine in the app’s source)